1 - 20 of 59,981 Works in Undertale (Video Game)
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My first Kinktober attempts :)
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"Long ago, two races ruled over Earth: Humans and Monsters." One race feared for their strong souls, the other for their magic, and the mages caught between them feared for both. All silently knew that war would be inevitable. The only thing that mattered was surviving it. One crimson mage understands that well, and is determined to keep herself and those she cares for alive.
Act Two sees Ferris as a young woman coming into her own as a mage. Overall, she's grown content with her life; however, when the Guildmaster orders her to work with the person she despises most for the betterment of the organization, she must leave the comforts of her new home and enter a wider field of conflict.
Series
- Part 2 of Dark Origins
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Those Long Winter Nights by djspaceinvader
Fandoms: Deltarune (Video Game), Undertale (Video Game)
09 Oct 2025
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What if Kris never got the chance to grow up with the Dreemurrs? No Asriel, no Asgore, no Toriel. And what if instead of Asriels old sweater, it was a fugly Christmas ensemble.
Following an accident in the recent past, Kris finds themselves, himself, growing up alongside Dess and Noelle for better and worse. How will things change, how will things stay the same?
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Sans did not remember his previous name, only that he had been human. Rebirth in Undertale was novel, but he adapted, until he realized that the universe he was in was not the original one.
Unfortunately, it was too late when the machine took him to another universe, into a room full of skeletons.
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Sans no recordaba su nombre anterior, solo haber sido un humano. Renacer en Undertale fue una novedad, pero se adaptó, hasta que cayó en cuenta de que el universo en el que estaba no era el original.Lamentablemente, ya era tarde cuando la máquina lo llevo a otro universo en un cuarto lleno de esqueletos.
Nota: Sé que suena como tragedia, pero en realidad es una historia bastante esponjosa de curación, o al menos eso intento. Nuestro protagonista tiene mucho trauma y lo va a sanar en una mansión llena de esqueletos incómodos
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A FINE LINE BETWEEN ORANGE AND YELLOW by Fantasy_Artist
Fandoms: Undertale (Video Game), Original Work
09 Oct 2025
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While Aneira didn't necessarily believe monsters existed, she did find the fact that everyone and their dog still did might mean something. Her childhood town of Beddgelert believed in monsters trapped under the mountains near their home that would need a seventh soul now to break out and destroy lands.
Aneira also knew that she needed to figure out what happened to the kid she was friends with who went missing. Which was how she found herself having fallen (probably) hundreds of meters below a mountain inside a cave system. Was she stupid for leaving without telling people where she was going, definitely, but, to be fair, she didn't expect to fall; she couldn't even see the hole.
Injured and wanting to go home, Aneira braves through the underground cave systems, finding MONSTERS both friendly and foes, learning about what happened to all the previous (children) HUMANS that fell.
tldr: Aneira falls instead of Frisk, is injured and is too stubborn not to use this chance to find out what happened to a friend (definitely dead by now, but she still wants to confirm), the Undertale cast feels like something is different, but not what. They also live in Wales here because why not?
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The Integration program is an arrangement to attempt at communicating between humans and monsters. 7 humans being sent down into Mt. Ebbott, each presenting something new that humans could offer the monsters. Through a tight and strict contract with the King and Queen, the Integration Program was formed. But there may be more than what they are letting on.. as a certain scientist would come to find.
- Language:
- English
- Words:
- 2,338
- Chapters:
- 1/1
- Hits:
- 4
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Frisk was always just a passive vessel... or so everyone thought.
What happens if the vessel seeks out its guide?
And what will they do to not lose them again?
Inspired by an AU made on tiktok by @sages_era.
More tags will be added when applicable. -
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Error's first meeting with the Dreamtale brothers, isn't exactly black and white
Day 7 Prompt 22
Series
- Part 7 of Fictober 2025
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The host, the trial, and the smell of hate by Youareagoldfish
Fandoms: Undertale (Video Game)
09 Oct 2025
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Set in the shifter au, Papyrus is a shifter.
He is found out, and those that called themselves his friends have found a way to discover when and how their Papyrus was killed and replaced.
Uh, the process makes him pretty sick, and then I get to write lots of hurt comfort :D
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First kinktober ever, list isn't complete but trust it will be done by Halloween.
Dedicating this fic to my very very special friend of mine. Pookie, if you see this, ily <3
Uh yeah, hope y'all enjoy ^^
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"Yo... yo soy... Un muy jodido problema" by Pptxie
Fandoms: Marvel Cinematic Universe, Undertale (Video Game), X-Men - All Media Types, Thunderbolts (Movie 2025)
09 Oct 2025
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"Deberías odiarme, Pepper! Soy un monstruo! Maté a mucha gente! Maté a mi mamá! Soy horrible!"
Le grito a Pepper con furia y ansiedad en mi tono, mis manos de metal brillan en respuesta a mi sentir, al verla retroceder con miedo escondiendo a Morgan detrás de ella me volteo intentando calmarme, después de varios segundos regulando mi respiración hablo más tranquila, sintiendo lágrimas saliendo de mis ojos por todo lo que deseo expresar pero no puedo, no siento que merezca decírselo, 'No merezco sentirme así' pienso.
"Yo no soy como el, Pots, no soy un héroe. El mundo lo sabe, tu lo sabes, yo lo sé... el.. el lo sabía"
Digo saliendo de la habitación sin volver ni voltear, empiezo a correr hacia la ventana abierta en la cabaña cuando escucho a Pepper llamarme, 'No, necesito ir con Bucky, no se porqué me siento así, se suponía que la terapia me estaba ayudando'. Digo saltando de la ventana antes de encender mis propulsores y dirigirme hacia la torre de los "Nuevos Vengadores" como nos nombró Valentía.
- Language:
- Español
- Words:
- 855
- Chapters:
- 1/?
- Hits:
- 2
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Kokoro Hikareteku by Veloo
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game), Deltarune (Video Game)
09 Oct 2025
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After a long week, Kanako Ketsukane, secretly one of the saviors of the world, is lying on her bed, unable to sleep.
Hey, didn't Starlo say he had a bunch of work today, and he was definitely gonna be there for a while? Why not check in?
- Language:
- English
- Words:
- 1,366
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 42
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deltarune chatfic I wrote with my friend by zilliz3000
Fandoms: Deltarune (Video Game), Undertale (Video Game)
08 Oct 2025
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I'm writing this with one of my irl friends (CREDITS TO HER LMAO SHE DOESN'T HAVE AO3)
WITNESS THE WONDER THAT IS A ZILLIZ AND FRIENDS CHATFIC, NOW COMES IN DELTARUNE COLOR!(ZILLIZ STATUS: I'm at the Spamton NEO fight)
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You fell.
Which honestly sucks ass.
You had been feeling weird, in your chest, for a while now.
Not sure how you ended up in a world of monsters but you do know one thing.
Your chest is pulling you towards something. And the closer you get, the more whole you feel.
You just hope you don't have to keep dying to get what your SOUL desires.
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Another year another Inktober. Here's my contribution.
All set in the same AU unless stated otherwise.Series
- Part 2 of Inktober
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Cross's intergalactic adventure! (Totally voluntary!) by GooLaGoo
Fandoms: Undertale (Video Game)
09 Oct 2025
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Cross's intergalactic adventure!
Totally not a kidnapping by Killer featuring the gang
or
Sad Cross gets yoinked into a gang of space fugitives and learns care!!!
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The Beginning of the End by Theseus (WellThenFuckMeGentlyWithAChainsaw)
Fandoms: Undertale (Video Game)
09 Oct 2025
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There was nothing.
And then there was something.
What's it mean to exist? How do you define your own existence?I believe the moments that immediately stick to us after existence can define a person, so whatever meanings you can pull from your surroundings will shape how you act.
————————————————————————Like a demon reaching a hand to a demon, the angel extends a hand to another angle.
Existence isn't meant to be spent alone and unhappy, so isn't it understandable to do whatever brings you joy?
Series
- Part 1 of All I Need To Do Is Smile!
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A strange creature has started visiting Gristol while he works in the Motherlobe's mail room. It doesn't seem like it wants to harm Gristol, instead preferring to giving him gifts every time it visits
This time, it brings a tasty treat for Gristol.
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You'd never expected to be one of those people who bonded with a random stray, and if you did, you never expected it to turn out like this. The tiny... blob of an animal was cute, affectionate, and melted your heart before you'd even named him. Unfortunately, not everything is as it seems. You've met this lovely creature before, and he definitely remembers you...
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You should be dead. Everyone else in this god forsaken city died as soon as the barrier came down and these creatures, these MONSTERS, invaded Ebott City. You got lucky, or maybe not.
You had the bloodline of a mage. Which meant you could create barriers. In a moment of panic you had created a barrier in your apartment, locking you and your neighbor inside, and the monsters out.
But now the clock was ticking and you had a group of skeletons sniffing around your apartment, telling you that they couldn’t wait to drag you back to their den.
They meant as food…. r-right?